Hole sealing plug capable of actively controlling blasting direction

Abstract

The hole sealing plug capable of actively controlling the blasting direction comprises a plug packaging bag, and the whole plug packaging bag is divided into a left material bearing area and a right material bearing area through a heat sealing compaction area which is longitudinally arranged. The middle of the plug packaging bag divides the left material bearing area and the right material bearing area into an upper part and a lower part through a transversely-arranged mild hot pressing area, and a grouting opening A and a grouting opening B are correspondingly formed in the lower end of a lower subarea of the left material bearing area and the lower end of a lower subarea of the right material bearing area. The left material bearing area is filled with a liquid chemical hole sealing material A through the grouting opening A. The right material bearing area is filled with a liquid chemical hole sealing material B through the grouting opening B. The grouting opening A and the grouting opening B are sealed through heat sealing after filling. The device can realize the function of controlling the expansion direction after the hole sealing material expands and breaks the bag, and has the advantages of simple structure, simplicity, convenience and rapidness in use and capability of controlling the expansion direction.

Description

Technical Field

[0001] The utility model relates to the technical field of underground gas extraction in coal mines, and in particular to a sealing plug capable of actively controlling a blasting direction. Background Art

[0002] In recent years, with the increase in mining depth, the gas content of coal seams has gradually increased, the gas pressure of coal seams has increased, and the workload of mine gas control has also increased accordingly, which has also put forward higher requirements for sealing technology and materials. It can not only ensure that the gas extraction effect remains stable for a long time, but also reduce the labor intensity of construction personnel during the sealing process and improve work efficiency.

[0003] However, after the bag of traditional chemical material sealing plugs is broken, the foaming material expands and diffuses freely in the hole under the action of gravity, resulting in poor sealing effect and high material consumption. Therefore, it is very necessary to design a new type of sealing plug that can overcome the traditional shortcomings. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sealing plug which can actively control the blasting direction, and has the advantages of simple structure, easy and quick use, and controllable expansion direction.

[0005] The utility model is realized through the following technical solutions:

[0006] Provided is a sealing plug for actively controlling the blasting direction, comprising a plug packaging bag, wherein the plug packaging bag is divided into a material-bearing left area and a material-bearing right area as a whole by a heat-sealed compaction zone arranged longitudinally, and the middle part of the plug packaging bag is divided into an upper and lower part by a light heat-pressed zone arranged transversely, and a grouting port A and a grouting port B are provided at the lower end of the lower partition of the material-bearing left area and the lower end of the lower partition of the material-bearing right area respectively, the material-bearing left area is filled with liquid chemical sealing material A through the grouting port A, and the material-bearing right area is filled with liquid chemical sealing material B through the grouting port B, and the grouting port A and the grouting port B are sealed by heat sealing after filling.

[0007] The heat-sealing compaction area tightly bonds the composite packaging material to form two material bearing areas on the left and right to prevent the liquid chemical sealing material from flowing out of this area. The light heat-sealing area makes the composite packaging material lightly bonded, and after bearing a certain external force, a channel can be formed to allow the two liquid chemical sealing materials to mix with each other, thereby facilitating the mixing and reaction of the chemical sealing materials A and B.

[0008] Furthermore, the area of ​​the material-bearing left zone is smaller than the area of ​​the material-bearing right zone.

[0009] Furthermore, the chemical sealing material A and the chemical sealing material B are both two-component polyurethane sealing materials that can react and expand after mixing, and the two-component materials are respectively filled in the upper partition and the lower partition of the material bearing left zone and the material bearing right zone.

[0010] When the material-bearing left or right area is squeezed by external force, the lightly hot-pressed area is opened, and the liquid chemical sealing material is mixed and begins to react and expand.

[0011] Furthermore, the reaction expansion speed of the two-component material of the chemical sealing material A is faster than the reaction expansion speed.

[0012] The two-component materials of chemical sealing material A can expand rapidly after mixing, have a fast reaction time, and a low foaming ratio. After solidification, the expanded filling area forms the first plugging between the extraction tube and the borehole wall; the two-component materials of chemical sealing material B expand slowly after mixing, have a slow reaction time, and a high foaming ratio. After solidification, the material expands in a predetermined direction between the extraction tube and the borehole wall after breaking through the blasting area.

[0013] Furthermore, an expansion filling zone is formed at the upper end of the upper partition of the material-bearing left zone, and the sealing material A in the material-bearing left zone expands outward through the expansion filling zone, and solidifies and seals between the extraction tube and the borehole wall; a blasting zone is formed at the upper end of the upper partition of the material-bearing right zone, and the sealing material B in the material-bearing right zone expands outward through the blasting zone, and solidifies and seals between the extraction tube and the borehole wall after expanding in a predetermined direction.

[0014] Furthermore, the plug packaging bag is composed of two PE layers, an aluminum layer and a PET layer.

[0015] The two-layer PE+aluminum+PET composite packaging material is processed by heat sealing technology and then filled with chemical sealing material, and its capacity can meet the amount of material required to seal the drilled holes.

[0016] Beneficial effects of the utility model:

[0017] The utility model can realize the function of controlling the expansion direction of the sealing material after the bag is expanded and broken. The device has the advantages of simple structure, easy and fast use, and can control the expansion direction; it can solve the shortcomings of traditional chemical material sealing plugs that cannot control the material expansion direction, have low air tightness, and require a large amount of material.

[0018] The utility model reduces the waste of chemical sealing materials, improves the sealing effect of the drill hole, improves the gas extraction rate, reduces the gas disaster safety accident rate, reduces the mine safety expenditure cost, and produces huge economic and social benefits in mine gas prevention and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the utility model.

[0020] As shown in the figure:

[0021] 1. Plug packaging bag, 2. Heat sealing and compacting area, 3. Material bearing left area, 4. Material bearing right area, 5. Mild hot pressing area, 6. Grouting port A, 7. Grouting port B, 8. Expansion filling area, 9. Explosion occurrence area. DETAILED DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0023] A sealing plug for actively controlling the blasting direction comprises a plug packaging bag 1, which is composed of two PE layers, an aluminum layer and a PET layer. The plug packaging bag 1 is divided into a material-bearing left area 3 and a material-bearing right area 4 by a heat-sealed compaction area 2 arranged longitudinally. Figure 1 As shown, the area of ​​the material-bearing left region 3 is smaller than the area of ​​the material-bearing right region 4 .

[0024] The middle part of the plug packaging bag 1 is divided into an upper and lower part by a light hot pressing zone 5 arranged laterally, namely, a material-bearing left zone 3 and a material-bearing right zone 4. Grouting ports A6 and B7 are provided at the lower end of the lower partition of the material-bearing left zone 3 and the lower end of the lower partition of the material-bearing right zone 4, respectively. The material-bearing left zone 3 is filled with liquid chemical sealing material A through the grouting port A6, and the material-bearing right zone 4 is filled with liquid chemical sealing material B through the grouting port B7. The grouting ports A6 and B7 are sealed by heat sealing after filling.

[0025] Chemical sealing material A and chemical sealing material B are both two-component polyurethane sealing materials that can react and expand after mixing. The two-component materials are respectively filled in the upper and lower partitions of the material-bearing left zone 3 and the material-bearing right zone 4. In the present utility model, the two-component polyurethane sealing materials used are all mature products of the prior art. The polyurethane sealing materials are composed of two basic materials, isocyanate and polyether polyol. According to their proportion formula and additives, they are divided into soft foam and hard foam. When applied to the present utility model, it is only necessary to meet the different reaction and expansion speeds of the polyurethane sealing materials on both sides, and the specific ingredients of each component are not limited. According to common knowledge and the content of the prior art, it is only necessary to select reactants suitable for the components and adjust the mixing ratio of the corresponding component materials to achieve the control of the expansion speed, so that the reaction and expansion speed on one side is fast, while the reaction and expansion speed on the other side is slow.

[0026] The reaction expansion speed of the two-component material of chemical sealing material A is faster than the reaction expansion speed of the two-component material of chemical sealing material B. In order to ensure that the utility model is fully disclosed, the utility model provides a prior art polyurethane sealing material in the prior art, CN201710051344.9, a highly flame-retardant polyurethane gas sealing material for coal mines and a preparation method thereof, which discloses that the sealing material is composed of component A and component B, and specifically discloses the specific composition and content of the corresponding components. The sealing material has the advantages of adjustable reaction speed, adjustable foaming ratio, and good flame retardant performance. As an implementation method of the utility model, this product of the prior art can be selected for use.

[0027] An expansion filling zone 8 is formed at the upper end of the upper partition of the material-bearing left zone 3, and the sealing material A in the material-bearing left zone 3 expands outward through the expansion filling zone 8, and solidifies and seals between the extraction tube and the borehole wall; a blasting zone 9 is formed at the upper end of the upper partition of the material-bearing right zone 4, and the sealing material B in the material-bearing right zone 9 expands outward through the blasting zone, and solidifies and seals between the extraction tube and the borehole wall after expanding in a predetermined direction.

[0028] Determine the sealing position of the sealing plug using active controlled blasting direction according to the on-site conditions, construct the gas extraction borehole, wrap the first flower pipe head with steel window screen and tie it firmly, tie the sealing plug using active controlled blasting direction to the predetermined sealing pipe, and ensure that the expansion filling area 8 is close to the borehole mouth, manually apply external force to the liquid sealing material in the material-bearing left area 3 and the material-bearing right area 4 of the sealing plug, so that the light heat sealing area 5 is forced to open, quickly knead the chemical sealing materials in the material-bearing left area 3 and the material-bearing right area 4, and then quickly send the sealing plug and the extraction tube into the predetermined plug position in the hole.

[0029] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A sealing plug for actively controlling the blasting direction, characterized in that: It includes a plugging packaging bag, which is divided into a material-bearing left area and a material-bearing right area by a longitudinally arranged heat-sealed compaction area, and the middle part of the plugging packaging bag is divided into an upper and lower part by a transversely arranged light heat-pressing area, and the lower end of the lower partition of the material-bearing left area and the lower end of the lower partition of the material-bearing right area are respectively provided with a grouting port A and a grouting port B, the material-bearing left area is filled with liquid chemical sealing material A through the grouting port A, and the material-bearing right area is filled with liquid chemical sealing material B through the grouting port B, and the grouting port A and the grouting port B are sealed by heat sealing after filling.

2. The sealing plug for actively controlling the blasting direction according to claim 1 is characterized in that: The area of ​​the material-bearing left zone is smaller than the area of ​​the material-bearing right zone.

3. The sealing plug for actively controlling the blasting direction according to claim 1 is characterized by: Both chemical sealing material A and chemical sealing material B are two-component polyurethane sealing materials that can react and expand after mixing. The two-component materials are respectively filled in the upper partition and the lower partition of the material bearing left zone and the material bearing right zone.

4. The sealing plug for actively controlling the blasting direction according to claim 3 is characterized by: The reaction expansion speed of the two-component material of chemical sealing material A is faster than the reaction expansion speed of the two-component material of chemical sealing material B.

5. The sealing plug for actively controlling blasting direction according to claim 1 is characterized in that: An expansion filling zone is formed at the upper end of the upper partition of the material-bearing left zone, and the sealing material A in the material-bearing left zone expands outward through the expansion filling zone, and solidifies and seals between the extraction tube and the borehole wall; an explosion occurrence zone is formed at the upper end of the upper partition of the material-bearing right zone, and the sealing material B in the material-bearing right zone expands outward through the explosion occurrence zone, and solidifies and seals between the extraction tube and the borehole wall after expanding in a predetermined direction.

6. The sealing plug for actively controlling blasting direction according to claim 1 is characterized by: The plug packaging bag is composed of two PE layers, an aluminum layer and a PET layer.

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